-
460
Democritus
Democritus was born around 460 BC and died around 370 BC. Democritus mad up an atomic theory similar to modern sciences understanding of the atom. His theory suggested that atoms can’t be destroyed and only differ in shape, position and arrangement. -
Isaac Newton
Isaac Newton was born in England on the 15th of December 1642 and died on the 20th of March 1727. Newton suggested that atoms are hold together. -
George Johnstone Stoney
George Johnstone Stoney was born in Ireland on 15th of February 1826 and died on the 5th of july 1911. George Johnstone Stoney introduced the term electron as the fundamental unit quantity of electricity. He first introduced the concept as early as 1974 and came up with the word in 1891. -
John Dalton
John Dalton was born on the 6th of September 1766 and died on the 27th of july 1844. John Dalton was an English chemist, meteorologist and physicist. He is best known for his pioneering work in the modern atomic theory. In the Dalton theory there are five main ponts.1. Elements are made of extremely small particles called atoms.2. Atoms of a fiven element are identical in size, mass and other properties.3. Atoms cannot be subdivided, created or destroyed.4. Atoms of different elements combi -
Sir Josephy John Thomson
Sir Joseph John Thomson was born on the 18th of December 1856 and died 30th August 1940. Joseph John Thomson was a British physicist. He discovered electrons and isotopes. Her also invented the mass spectrometer. -
Niels Henrik David Bohr
Niels Henrik David Bohr was a Danish physicist born on the 7th of October 1885 and died on the 18th of November 1962. Niels Bohr made many contributions to understanding atomic structure and quantum mechanics. -
James Chadwick
James chadwick born 20th October 1891 died in 24th July 1974 Was and English Laureate in physics and was awarded for his discovery of the neutron.James Chadwicks discovery made it possible to produce elements heavier than uranium. -
The Electron
The Electron was discovered -
proton
The Proton was discovered. -
the neutron
the neutron was discovered -
Ernest Rutherford
Ernest Rutherford was born in 30th August 1971 and died on the 19th of October 1937. He was New Zealand born but moved to Britain. He became known as the father of nuclear physics. He is considered the greatest experimentalist since Michael Faraday. Ernest Rutherford theorized that atoms have their charge concentrated in a very small nucleaus. He late made the Rutherford model of the atom. He also was one of the first people to split an atom in 1917.
